Dating back to the second century, vestiges of prehispanic mural paintings are found in this underground palace.

In the 16th century, a Franciscan monk pulled off a construction miracle by building a Roman-style aqueduct to save the town of Otumba, Mexico, from certain death.

An Aztec temple, the largest man-made pyramid in the world, sits buried in earth with a Spanish church set on top.

The splendor of this 17th century golden chapel has led it to be called the "eighth wonder of the world."

These sacred Mesoamerican ruins feature peculiar petroglyphs hidden in the stones.

A 16th-century monastery boasts a lush array of plants native to Mexico’s most biodiverse region.

In a town defined by its incredible trees, having a shrine in one just makes sense.

The stoutest tree in the world.

This beautifully deceptive waterfall is something far different from what it appears to be.

Local lore claims this rocky cape hides a lost Aztec treasure.

In this breathtaking canyon, crocodiles bask on boulders and glide through the murky waters.

The masses at this church incorporate enough moonshine and animal sacrifice that they are no longer recognizably Catholic.

An elaborate Mayan city shrouded in alien conspiracy revealed the tomb of Pacal the Great.

Three small rooms in the jungle house the most elaborate and intact murals of the Mayan world.

The ruins of an ancient Mayan city, beautifully preserved and only accessible by boat.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

A lush green oasis in the middle of Chicago.

Hidden deep in the Guatemalan jungle is a turquoise paradise of natural pools, caves, and waterfalls.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

The only quarter of the Old City not dedicated to a major world religion.

A "miracle" that seems to produce more holy fistfights than holy revelations.

Sprawling archeological site of an 8th-century Islamic castle.